Making porous plates



starts 'i Ti t l ItIAKIN'G POROUS PLATES.

No Drawing.

To all whom it may concern:

Be it known that 1, AUGUST J. Ktonnois, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Making Porous Plates, of which the following is specification.

This invention relates to methods of casting porous plates. Although particularly adapted for use with storage batteries for electrical currents, it will be obvious that porous metal plates may find a use for other purposes than said batteries.

In making said plates, 1 fill. the mould for the plates with a suitable wool not affected by the molten metal of which the plates are to be cast. For instance, lead plates for storage batteries are cast in moulds filled vith iron wool, asbestos or suitable metallized fibre and by wool is meant suitable threads, strings or wires of metal or other material. which will not be molten or decomposed by the casting metal heat; the same may be woven in suitable mesh or irregularly placed into said mould, as convenient or desired.

After casting of said plates, the same are placed into a suitable acid, as for instance, sulfuric acid for lead. plates which contain iron wool. Thus, the sulfuric acid will dissolve the iron wool in the lead plates but leave the lead of the plates unaffected. The result will be a porous lead plate more efficient tor a storage battery than a solid lead plate.

In the same manner may plates of other metals he made, if desired. For instance,

Specification of Letters Patent.

Application filed October 30, 1917.

Patented Jan. 10,1922.

Serial No. 199,280.

porous iron plates may be made by filling the mould with cemented fibre, which may be dissolved after casting of said plates.

Having now fully described my invention what I claim as new and desire to secure by Letters Patent is:

l. The method of making metal plates with hair like pores through the same, which consists in filling a casting mould for said metal plates with threads or wires of a nonfusible material with respect to and by the heat of a casting metal and which will not be affected by the molten metal for the plates, so that the threads will fill and contact with. the Walls of the mould and extend from one wall to the other wall, casting thereupon said metal plates and removing the embedded thread material from the cast plates, substantially as described.

2. A cast metal plate having irregular thread like pores through the same in various angular directions, said pores extending through said plate and from one side to the other side, substantially as set forth.

The method of making porous lead plates for storage batteries, which consists in filling the mould for said plates with fine iron wires having a higher melting point than said lead for making casting, casting thereupon said lead plates and dissolving the imbedded not melted iron wires from the finished plate.

In witness whereof I hereunto subscribe my name in the presence of two witnesses. AUGUST J. KLONEOK. lVitnesses MARTIN POPPELAUER, Nonennr LANDAU. 

